package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.client.HttpClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * @Author: XJH
 * @Description: TODO
 * @Date: 2025/6/7 16:37
 * @Version: 1.0
 */
@Service
@Slf4j
public class UserServiceImpl implements UserService {
    //微信服务接口地址
    public static final  String wx_LOGIN="https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    /**
     * 微信登录
     * @param userLoginDTO
     * @return
     */
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //调用微信接口服务，获取当前用户的openId
       String openid= getOpenid(userLoginDTO.getCode());

        //判断openid是否为空、如果为空表示登录失败，抛出业务异常
        if(openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前用户是否为新用户
     User user= userMapper.getByOpenid(openid);
        //如果是新用户，自动完成注册
        if(user==null){
          user=  User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
          userMapper.insert(user);
        }

        //返回这个用户对象
        return user;
    }

    /**
     *调用微信接口服务，获取当前用户的openId
     * @param code
     * @return
     */
    private String getOpenid(String code) {
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");

        log.info("调用微信接口参数：{}", map);
        String json = HttpClientUtil.doGet(wx_LOGIN, map);

        log.info("微信接口返回：{}", json);
        JSONObject jsonObject = JSON.parseObject(json);

        // 检查是否有错误码
        if (jsonObject.containsKey("errcode")) {
            int errCode = jsonObject.getIntValue("errcode");
            String errMsg = jsonObject.getString("errmsg");
            log.error("微信接口错误：errcode={}, errmsg={}", errCode, errMsg);
            return null;
        }

        String openid = jsonObject.getString("openid");
        return openid;
    }
}
